public class StringBufferDemo{
   public static void main(String [] args){
       StringBuffer buffer = new StringBuffer();
       buffer.append('S');
       buffer.append("tringBuffer");
       System.out.println(buffer.charAt(1));
       System.out.println(buffer.capacity());
       System.out.println(buffer.indexOf("tring"));
       System.out.println("buffer = " + buffer.toString());
  }
}

